Update copy right timeline

Author: auvipy

rest_framework/__init__.py

@@ -13,7 +13,7 @@
 __version__ = '3.14.0'
 __author__ = 'Tom Christie'
 __license__ = 'BSD 3-Clause'
-__copyright__ = 'Copyright 2011-2019 Encode OSS Ltd'
+__copyright__ = 'Copyright 2011-2023 Encode OSS Ltd'
 
 # Version synonym
 VERSION = __version__